"Nothing but wind, like a German bulletin," grinned Billy, stretching himself.

"Or their U-boat prophecies," added Frank. "But cheer up, fellows, this sunshine can't last forever."

There came at last just the kind of weather wanted. A soft drizzle set in at nightfall, not enough to make the ground muddy, but enough to make the steaming and saturated air lie heavy on the earth. Everything indicated that there would be a fog at dawn.

"I guess to-morrow's the big day," remarked Frank, as he looked out at the settling mists.

"High time," grumbled Tom. "I'd grow stale if we had to wait much longer."

The regiments slept on their arms that night, and an hour before dawn all were astir and in their places. There was no special artillery fire, such as usually preceded big attacks. It was given to the tanks to level the entanglements of the enemy and open up the gaps for the troops to swarm through.

The hour dragged by until within ten minutes of the time appointed for the a.s.sault. Then a monotonous hum filled the air as the motors of the tanks tuned up. Down through the black lines of waiting soldiers the gray monsters slowly made their way, pa.s.sed through the gaps made in the defences and led the way into the desolate stretch of No Man's Land.

Even to the friendly eyes that watched them there was something weird and frightful in their aspect. It was as though the huge brutes of the prehistoric world had taken form before them. Even those monsters had never carried within them such death-dealing power.

As the sea closes in the wake of a ship, the troops fell in behind the tanks, and the silent procession took up the march toward the German lines.

Hardly a sound beyond the labored breathing of the tanks broke the stillness. It might have been an army of ghosts.

On they went, and with every step the conviction grew that the surprise would be complete. No thunder broke from the enemy guns. No fiery barrage swept the dense ranks, exacting its toll of wounds and death.

For once the Hun was asleep.

Nearer and nearer. Then like so many thunderbolts at a hundred different points they struck the German lines and the tanks went through!

CHAPTER XIII

CAUGHT NAPPING

Nothing could stand before the terrific impact of the war tanks.

There was a grinding, tearing, screeching sound, as wire entanglements were uprooted. These had been strengthened in every way that German cunning could invent, but they bent like straws beneath the onslaught of the gray monsters. A cyclone could not have done the work more thoroughly.

There was no need now for further secrecy, and with a wild yell the Allied troops swarmed through the gaps, sending a deadly volley before them, supplemented by thousands of grenades.

At the same instant, the Allied artillery opened up and laid a heavy barrage fire over the heads of the onrushing troops.

The blow came down on the Germans with crushing force. The surprise was complete. Every detail of the great drive had been mapped out with the precision of clockwork, and so nicely had it been timed that on every part of the long line the shock came like a thunderbolt.

A horde of Germans rushed up from the trenches and poured in a great stream into the open. The earth seemed to disgorge itself. They came shouting and yelling in wild consternation, their eyes heavy with sleep and their faces pallid with fear.

Fear not so much of the Allied troops rushing upon them. These they had faced in many battles, and though they knew the mettle of their foes, they were still men who could be faced on even terms. But their courage gave way when through the spectral mists they saw the wallowing monsters bearing down on them like so many Juggernauts, crushing, tearing, mowing them down as though they were insects in the path of giants.

The men fled helter-skelter in the wildest panic that had come upon them since the outbreak of the war. In vain their officers shouted and cursed at them. The iron bonds of discipline snapped like threads. Soldiers rushed hither and thither like ants whose hill had been demolished by a ruthless foot.

Many fled back toward their second line, pursued by a withering blast of rifle fire that reaped a terrible harvest of wounds and death. Others rushed back into their trenches, crowding and treading upon one another.

But even here they were not safe from the great tanks, which lumbered down into the trenches and up on the other side, leaving devastation in their wake, spitting out flame from the guns they carried, while they themselves in their iron armor went on uninjured.

Not only were they frightful engines of offense, but they served as well for defense of the troops that followed after them.

For the first few minutes the slaughter was awful, and it looked as though the whole German line would be forced to give way without putting up any resistance worthy of the name. Prisoners were rounded up by the hundreds. There was no time then to send them to the rear. So they were gathered together in the open s.p.a.ces, their suspenders were cut so that their trousers would slip down and entangle their legs if they tried to escape in the confusion, a small guard was put over them, and the tanks and the troops went thundering on toward the second line.

But here the resistance began to stiffen. The first paralysis of surprise was past. The heavy guns of the enemy opened up, and from scores of machine gun nests and pill boxes came a storm of bullets. The German officers had got their troops under some semblance of control, and heavy reinforcements were rushed up from the rear. From now on the Allies had an awakened and powerful foe to reckon with.

But despite the sterner opposition, the tanks were not to be denied. On they went, as resistless as fate. Their sides were reddened now, and the wake they left behind them was fearful to look upon.

Through the second line entanglements they crashed as easily as through the first, although this time they met with losses. Some had overturned and others had been struck by heavy sh.e.l.ls and put out of action. But even though disabled, the guns on one side or the other were still able to pour out their messengers of death and take savage toll of the enemy.

Jumbo was leading, and close behind followed the boys of the old Thirty-seventh, with Frank and his chums in the van. They were fighting like young Vikings, their rifles empty but their bayonets and hand grenades doing deadly work. Their arms were tired by their terrific efforts, but their hearts were on fire. They felt as though they were treading on air, and the blood ran through their veins like quicksilver.

Bunker Hill and Gettysburg spoke through them. The traditions of a hundred glorious battlefields on which Americans had fought was theirs.

Now again Americans were fighting, fighting to avenge the murdered women and babies of the Lusitania, fighting to crush the most barbarous tyranny the modern world has known, fighting the battle of freedom and civilization.

So they fought on like demons, smashing a pill box here, routing out a machine gun nest there, until the second line was carried. Then the conquerors paused for breath.

On the whole German front in that region two lines deep the line had been smashed. That crowded hour of stark fighting had cracked the boasted invincible line of Hindenburg and sent the foe flying in confusion toward their third and most formidable line. Thousands of prisoners and scores of guns were among the spoils of victory.

And the most gratifying feature of the drive was the insignificant loss to the Allied forces. The resistance at first had been only slight, and even in the second phase of the battle it had been so quickly overcome that few of the attacking troops had fallen. Seldom had so great an advance been made at so small a price.

But modern warfare has its limits in the matter of time and speed. The very swiftness with which they had advanced had in itself an element of danger because it had brought them too far ahead of their supporting guns. These had to be brought up from the rear, and the captured positions had to be reorganized. The troops, too, had to be given a breathing spell, for they had reached the limit of human endurance.

So a halt was called, and the wearied men took turns in resting and refreshing themselves for the hard work that still lay ahead of them.

"A mighty good morning's work," panted Frank, as he threw himself down at the roots of a giant tree which had been utterly stripped of branches and even of bark by the tempest of fire that had raged around it.

"Ask a German and see if he'd agree with you," said Billy with a grin.

"We've got plenty to ask," said Tom, as his eyes roved over the throng of prisoners. "We sure have taken a raft of them this morning. And there's a still bigger bunch that will never answer roll call again."

There was food in plenty, but they did not have to avail themselves of the rations they carried in their kits. There were the camp kitchens of the enemy that in a twinkling were set to work, and soon the savory odors of steaming stews and fragrant coffee filled the smoke-laden air and brought joy to the hearts of the victors.

Frank, Bart, Billy and Tom were lucky enough to stumble on a meal that had already been started for some German officers, and they were surprised to find it so good and abundant.

"The Germans may be starving, but there's no sign of it here," remarked Frank, as he threw himself down on the ground with a sigh of relief.

"Trust the Huns to look after their soldiers, even if the civilians starve," replied Bart. "The people don't count in Germany. Only the military are taken seriously. They take the middle of the sidewalk and others are crowded to the wall."

"Well, I'm not quarreling with them just now on that account," grinned Billy. "I'm just glad there's plenty of grub here this morning."

"I'm not very partial to German cooking as a rule," chuckled Tom, "but this stew certainly smells good. How the Boche officers would grit their teeth if they saw us wading into this."

But his rejoicing was premature, for just at this moment a cannon shot from the German lines tore its way through the kettle and the scalding broth was spattered all over the group that were lying about. Luckily it did no other damage, but the chagrin of the boys was comical to see.

"I'd like to have hold of the gunner that fired that shot," sputtered Tom wrathfully, as he wiped from his face some of the stew that had fallen to his share.

"You ought to have knocked wood when you talked of the German officers seeing us wading into their chow," growled Bart. "There's a perfectly good stew gone to the dogs."